| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.76 |
| Score | 0% | 75% |
4! = ?
5 x 4 x 3 x 2 x 1 |
|
4 x 3 x 2 x 1 |
|
3 x 2 x 1 |
|
4 x 3 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.
| 1 | |
| 1.5 | |
| 6.0 | |
| 2.8 |
1
The total water usage for a city is 40,000 gallons each day. Of that total, 14% is for personal use and 30% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 1,250 | |
| 9,800 | |
| 10,000 | |
| 6,400 |
30% of the water consumption is industrial use and 14% is personal use so (30% - 14%) = 16% more water is used for industrial purposes. 40,000 gallons are consumed daily so industry consumes \( \frac{16}{100} \) x 40,000 gallons = 6,400 gallons.
What is the next number in this sequence: 1, 3, 5, 7, 9, __________ ?
| 10 | |
| 11 | |
| 19 | |
| 18 |
The equation for this sequence is:
an = an-1 + 2
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 2
a6 = 9 + 2
a6 = 11
If a car travels 420 miles in 6 hours, what is the average speed?
| 30 mph | |
| 70 mph | |
| 75 mph | |
| 40 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)